#include <iostream>
using namespace std;

int main()
{

	float  num1 =2;
	float num2 =2;
	cout << num1<<endl;
		cout << num2<<endl;

	cout << "num1+num2="<<num1+num2<<endl;
	cout << "Hello world!"<< endl; //endl是换行

	return 0;
   
}
